Nagaoka Project : Overview of the CO2 Geological Storage Project

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Overview of CO2 Geological Storage

Overview of the CO2 Geological Storage Project

Classification of Aquifer Storage


	Demonstration Test and Monitoring at the Iwanohara Test Site Basic Research Survey of Storage Capacity in Japan Evaluation of Effectiveness

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Overview of the CO2 Geological Storage Project

Purpose of the CO2 Geological Storage Project

To implement CO2 geological storage technology in full scale in Japan, various research topics need to be addressed, including behavior of CO2 during and after injection, long-term stability of CO2 in the reservoir, and the potential and costs of CO2 storage.

The CO2 geological storage project is being carried out to clarify these issues associated with CO2 underground storage. It is intended to establish a technology that can separate and capture CO2 from large-scale emission sources and store it safely in complex aquifers located in Japan over the long term. Incorporating both domestic and overseas trends, this project strives to build a solid basis for CO2 reduction by performing estimation of storage capacity, efficacy evaluation via cost analysis, and review of safety assessment methods for possible implementation of geological storage in Japan.

Project Objectives

FY2000-FY2004
To obtain a scientific understanding of CO2 behavior, CO2 injection demonstration tests were conducted at the Iwanohara site in Nagaoka City, Niigata Prefecture, which is located above a Category A aquifer.

FY2005-FY2007
To compile the results of demonstration tests conducted at the Iwanohara site and to extend a reservoir option to Category B aquifers, a research plan for clarifying and demonstrating the trap mechanism was prepared, and issues related to storage capacity calculation and safety assessment methods were addressed.

FY2008 and after
Based on the results of the basic demonstration tests, etc. conducted on Category B aquifers, technological knowledge will be accumulated and consolidated to enable commercial-scale geological storage beginning in 2015.

R&D on Individual Element Technologies

Individual element technology		Objective
(1) Development of safety assessment methods	Demonstration test and monitoring at the Iwanohara site	To ascertain the storage conditions by injecting CO2 into the Category A aquifer and collecting the data on CO2 behavior. To verify that stable geological storage is possible using a newly-developed long-term behavior simulator.
(1) Development of safety assessment methods	Basic research	To provide basic data for the monitoring at the Iwanohara site. To obtain scientific knowledge which enables geological storage in the Category B aquifers.
(2) Overall evaluation	Survey of potential storage capacity in Japan	To present the potentiality of safe and secured long-term storage of CO2 in Japan's aquifers.
(2) Overall evaluation	Evaluation of effectiveness	To confirm the effectiveness of geological storage based on the cost analysis and the available storage capacity. To provide a road map for solving technical problems.

CO2 Injection Demonstration Tests at Iwanohara, Nagaoka City, Niigata Prefecture

CO2 injection demonstration tests were performed at the Iwanohara test site in Nagaoka City, Niigata Prefecture.